* Owner's Manual: The most reliable source is your vehicle's owner's manual. It should have a dedicated section showing the fuse box locations and diagrams.
* Under the Hood: The fuse box itself usually has a diagram printed on the inside of the cover.
* Online: Several websites offer free repair manuals and diagrams. Search for "1999 Ford Expedition fuse box diagram" on Google, Bing, or your preferred search engine. Be cautious and choose reputable sources. Sites like Ford's official website might offer some information, though full diagrams might require a subscription or purchase. You might also find helpful information on forums dedicated to Ford Expeditions.
* Repair Manuals: A Haynes or Chilton repair manual specific to your year and model Expedition will contain detailed fuse box diagrams and information. These are available at auto parts stores and online retailers.
Remember to always disconnect the negative battery terminal before working on fuses or electrical components to prevent damage or injury.
